22773240 has 144 divisors (see below), whose sum is σ = 86163480. Its totient is φ = 5201280.

The previous prime is 22773221. The next prime is 22773277. The reversal of 22773240 is 4237722.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16995 + ... + 18285.

Almost surely, 2^22773240 is an apocalyptic number.

22773240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22773240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43081740).

22773240 is an abundant number, since it is smaller than the sum of its proper divisors (63390240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22773240 is a wasteful number, since it uses less digits than its factorization.

22773240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322 (or 1308 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 22773240 is about 4772.1315991913. The cubic root of 22773240 is about 283.4490077469.

The spelling of 22773240 in words is "twenty-two million, seven hundred seventy-three thousand, two hundred forty".